title: The new mixed agonist-antagonist analgesics, nalbuphine and butorphanol, vs. pentazocine: relapse and substitution in morphine-addict rats.
mesh_terms: D000700:Analgesics / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D000818:Animals; D002077:Butorphanol / Q000494:pharmacology*; D005260:Female; D006801:Humans; D009019:Morphinans / Q000494:pharmacology*; D009020:Morphine; D009266:Nalbuphine / Q000494:pharmacology*; D010423:Pentazocine / Q000494:pharmacology*; D051381:Rats; D012646:Self Administration; D012895:Sleep, REM; D019966:Substance-Related Disorders / Q000523:psychology
chemical_list: D000700:Analgesics; D009019:Morphinans; D009020:Morphine; D009266:Nalbuphine; D002077:Butorphanol; D010423:Pentazocine